/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h
Find a single advertised session by session id (with userdata)
true on success, false otherwise
virtual bool FindSessionById ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & SearchingUserId, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & SessionId, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & FriendId, const [FString](API\Runtime\Core\Containers\FString) & UserData, const [FOnSingleSessionResultCompleteDelegate](API\Plugins\OnlineSubsystem\Interfaces\FOnSingleSessionResultCompleteDe-) & CompletionDelegate )